bibliothek.gui.dock.util

Class NullPriorityValue<T>

java.lang.Object

bibliothek.gui.dock.util.NullPriorityValue<T>

Type Parameters:

T - the kind of value stored in this NullPriorityValue

public class NullPriorityValue<T>
extends Object

This container holds three versions of the same value, a default, theme and a client value. If asked for the value the value with the highest priority is returned. Other than PriorityValue this container also supports null as value.

Author:

Benjamin Sigg

Constructor Summary

Constructors

Constructor and Description
NullPriorityValue()

Method Summary

Modifier and Type	Method and Description
T	get() Gets the current value with the highest priority.
T	get(Priority priority) Gets the value for a given priority.
boolean	isSet(Priority priority) Tells whether the value for priority is set.
boolean	isSomethingSet() Tells whether at least one version is set.
boolean	set(Priority priority, T value) Sets the value for a given priority.
boolean	unset(Priority priority) Removes the value for priority.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullPriorityValue

public NullPriorityValue()

Method Detail

set

public boolean set(Priority priority,
                   T value)

Sets the value for a given priority.

Parameters:

priority - the priority of value

value - the new value, can be null

Returns:

true if the result of get() changes because of the call of this method

isSomethingSet

public boolean isSomethingSet()

Tells whether at least one version is set.

Returns:

true if at least some value is set

isSet

public boolean isSet(Priority priority)

Tells whether the value for priority is set.

Parameters:

priority - the priority to inquire

Returns:

true if the value is set

unset

public boolean unset(Priority priority)

Removes the value for priority.

Parameters:

priority - the priority to clean

Returns:

true if the result of get() changes because of the call to this method

get

public T get(Priority priority)

Gets the value for a given priority.

Parameters:

priority - the priority for which the value is requested

Returns:

the value that was set(Priority, Object) for priority

get

public T get()

Gets the current value with the highest priority.

Returns:

the value or null